S. Asokan

Effect of oil pulling on plaque induced gingivitis: A randomized, controlled, triple-blind study (2009)

The thermal properties and electrical-switching behavior of semiconducting chalcogenide SbxSe55-xTe45 (2 <= x <= 9) glasses have been investigated by alternating differential scanning...

Asokan, S, Emmadi, P, Chamundeswari, R

Anomalous thermal dynamics of Bragg gratings inscribed in germanosilicate optical fiber (2009)

Rahman, A, Madhav, Venu K, Srinivasan, B, Asokan, S

An interesting, periodic appearance of a new peak has been observed in the reflected spectrum of a Fiber Bragg Grating (FBG) inscribed in a germanosilicate fiber during thermal treatment. The new...

Thermal diffusivity measurements on As-Te-Ga glasses by photo-thermal deflection technique: Composition dependence and topological thresholds (2009)

Manikandan, N, Paulraj, M, Asokan, S

The thermal diffusivity (alpha) of As20Te80-xGax glasses (7.5 <= x <=18.5) has been measured using photo-thermal deflection (PTD) technique. It is found that the thermal diffusivity is...

Composition dependent electrical switching behavior of As-Te-I chalcohalide glasses (2008)

One-wavelength fiber Bragg grating array interrogation by reflectivity division multiplexing (2008)

The electrical switching behavior of bulk, melt-quenched AS(45)Te(55-x)I(x) glasses has been studied as a function of composition (3 <= x <= 10). It is found that these glasses exhibit a memory...

Madhav, KV, Yamdagni, S, Srinivas, T, Asokan, S

We present a novel fiber Bragg grating array interrogation system wherein all the sensors have the same Bragg wavelength but different reflectivities. The sensor grating signals are tracked using a...

Composition dependent electrical switching in $Ge_xSe_{35-x}Te_{65} (18 \leq x \leq 25)$ glasses - the influence of network rigidity and thermal properties (2008)

Composition dependent electrical switching in $Ge_xSe_{35−x}Te_{65} (18 \leq \times \leq 25)$ glasses – the influence of network rigidity and thermal properties (2008)

Electrical switching investigations and supportive thermal studies have been undertaken on semiconducting chalcogenide $Ge_xSe_{35-x}Te_{65} (18 \leq x \leq 25)$ glasses prepared in bulk form. An...

A sharp thermally reversing window in $As_{45}Te_{55-x}I_x$ chalcohalide glasses revealed by alternating differential scanning calorimetry and photo thermal deflection studies (2008)

Electrical switching investigations and supportive thermal studies have been undertaken on semiconducting chalcogenide $Ge_xSe_{35−x}Te_{65} (18 \leq \times \leq 25)$ glasses prepared in bulk form....

Signatures of an extended rigidity percolation in the photo-degradation behavior and the composition dependence of photo-response of Ge-Te-In glasses (2008)

The composition dependence of different thermal parameters such as glass transition temperature, non-reversing enthalpy, thermal diffusivity etc., of bulk $As_{45}Te_{55-x}I_x$ chalcohalide glasses...

Manikandan, N, Asokan, S

Time dependent photocurrent measurements have been undertaken on bulk $Ge_{15}Te_{85-x}In_x (1 \leq x \leq 11)$ series of glasses. It is found that samples with x < 3 do not exhibit any...

The presence of a thermally reversing window in Al–Te–Si glasses revealed by alternating differential scanning calorimetry and electrical switching studies (2008)

Anbarasu, M, Singh, KK, Asokan, S

Alternating differential scanning calorimetric (ADSC) studies and electrical switching experiments have been undertaken on $Al_{15}Te_{85-x}Si_x$ (2 \leq x \leq 12) system of glasses. These glasses...

Synthesis and characterization of $Y_3Al_5O_{12}$ and $ZrO_2–Y_2O_3$ thermal barrier coatings by combustion spray pyrolysis (2008)

Saravanan, S, Srinivas, Hari G, Jayaram, V, Paulraj, M, Asokan, S

$Y_3Al_5O_{12}$ and $ZrO_2–Y_2O_3$ (8 mol% YSZ) coatings for potential application as thermal barrier coatings were prepared by combustion spray pyrolysis. Thermal cycling of as deposited coatings...

Oil pulling therapy (2008)

Asokan, S

An evidence for a microscopic phase separation in AsSeAg glasses revealed by thermal and structural investigations (2008)

Investigation on chalcogenide glasses for its threshold phenomena using photothermal methods (2008)

Alternating Differential Scanning Calorimetric (ADSC)studies show that Se rich $As_{20}Se_{80-x}Ag_x$(0 \leq x \leq 15) glasses exhibit two endothermic glass transitions and two exothermic...

Paulraj, M, Ravi, Jyotsna, Pattanak, Pulok, Saavedra, R, Morales, JE, Lee, Thomas S, ...

Photoacoustic spectroscopy (PAS) and Photothermal beam deflection spectroscopy (PBS) was used to study the bulk $Ge_{7.5}As_xTe_{92.5-x}$ alloy glasses in the composition range, 17.5 ≤ x ≤ 60...

Effect of oil pulling on Streptococcus mutans count in plaque and saliva using Dentocult SM Strip mutans test: A randomized, controlled, triple-blind study (2008)

Asokan, S, Rathan, J, Muthu, M, Rathna, PV, Emmadi, P, ...

An evidence for a microscopic phase separation in AsSeAg glasses revealed by thermal and structural investigations (2008)

The presence of a thermally reversing window in Al–Te–Si glasses revealed by alternating differential scanning calorimetry and electrical switching studies (2008)

Alternating Differential Scanning Calorimetric (ADSC)studies show that Se rich $As_{20}Se_{80-x}Ag_x$(0 \leq x \leq 15) glasses exhibit two endothermic glass transitions and two exothermic...

Anbarasu, M, Singh, KK, Asokan, S

Alternating differential scanning calorimetric (ADSC) studies and electrical switching experiments have been undertaken on $Al_{15}Te_{85-x}Si_x$ (2 \leq x \leq 12) system of glasses. These glasses...

Investigation on chalcogenide glasses for its threshold phenomena using photothermal methods (2008)

Paulraj, M, Ravi, Jyotsna, Pattanak, Pulok, Saavedra, R, Morales, JE, Lee, Thomas S, ...

Photoacoustic spectroscopy (PAS) and Photothermal beam deflection spectroscopy (PBS) was used to study the bulk $Ge_{7.5}As_xTe_{92.5-x}$ alloy glasses in the composition range, 17.5 ≤ x ≤ 60...

Synthesis and characterization of $Y_3Al_5O_{12}$ and $ZrO_2–Y_2O_3$ thermal barrier coatings by combustion spray pyrolysis (2008)

Saravanan, S, Srinivas, Hari G, Jayaram, V, Paulraj, M, Asokan, S

$Y_3Al_5O_{12}$ and $ZrO_2–Y_2O_3$ (8 mol% YSZ) coatings for potential application as thermal barrier coatings were prepared by combustion spray pyrolysis. Thermal cycling of as deposited coatings...

Glass transformation studies in Ge-Se-Bi system (2007)

Achamma, G, Sushama, D, Asokan, S, Awasthi, AM, Predeep, P

The thermal behavior of bulk glasses in the $Ge_{20}Se_{80-x} Bi_x$ (x = 2.5, 4.0, 6.0 at %) system is studied using modulated differential scanning calorimetry (MDSC). All samples have the same...

The influence of network rigidity on the electrical switching behaviour of Ge–Te–Si glasses suitable for phase change memory applications (2007)

Noonan syndrome: A case report (2007)

$Ge_{15}Te_{85-x}Si_x (2 \leq x \leq 12)$ glasses of a wide range of compositions have been found to exhibit electrical switching at threshold voltages in the range 100–600V, for a sample thickness...

Asokan, S, Muthu, M, Rathna, PV

A programmable high voltage electrical switching analyzer for I-V characterization of phase change materials (2007)

Electrical switching and thermal studies on $Ge_{22}Te_{78-x}I_x$ chalcohalide glasses: The effect of iodine on network-topology (2007)

Ovonic Phase-Change Materials have found a renewed interest in the recent times owing to their applications in Non-Volatile Random Access Memories. In the present work, a cost-effective high voltage...

High field electrical behaviour in lithium–phospho–vanadate glass system (2007)

Investigations on the electrical switching behavior and thermal studies using Alternating Differential Scanning Calorimetry have been undertaken on bulk, melt-quenched $Ge_{22}Te_{78-x}I_x$ (3 \leq x...

Reddy, Narayana C, Asokan, S, Anavekar, RV

The high field electrical switching behaviour of lithium–phospho–vanadate glasses has been studied by determining the current–voltage characteristics. The investigated glasses exhibit...

Electrical switching and spectroscopic studies of silver-vanado-phosphate glasses (2007)

Eraiah, B, Anavekar, RV, Asokan, S

High field electrical switching studies on x $Ag_2O$ – (50–x) $P_2O_5$ –50$V_2O_5$ glasses have been carried out as a function of sample thickness, composition and temperature. The I–V...

Photo-thermal deflection and electrical switching studies on Ge–Te–I chalcohalide glasses (2007)

Pattanayak, Pulok, Manikandan, N, Paulraj, M, Asokan, S

Measurements on thermal diffusivity $(\alpha)$ and electrical switching studies have been undertaken on bulk, melt-quenched $Ge_{22}Te_{78-x}I_x (3\leq x \leq10)$ chalcohalide glasses. The thermal...

High field electrical behaviour in lithium–phospho–vanadate glass system (2007)

Reddy, Narayana C, Asokan, S, Anavekar, RV

The high field electrical switching behaviour of lithium–phospho–vanadate glasses has been studied by determining the current–voltage characteristics. The investigated glasses exhibit...

Photo-thermal deflection and electrical switching studies on Ge–Te–I chalcohalide glasses (2007)

Pattanayak, Pulok, Manikandan, N, Paulraj, M, Asokan, S

Measurements on thermal diffusivity $(\alpha)$ and electrical switching studies have been undertaken on bulk, melt-quenched $Ge_{22}Te_{78-x}I_x (3\leq x \leq10)$ chalcohalide glasses. The thermal...

RIGIDITY PERCOLATION AND CHEMICAL THRESHOLD OBSERVED IN Ge$_{7.5}$As$_x$Te$_{92.5-x}$ CHALCOGENIDE GLASSES STUDIED FROM ITS THERMAL AND OPTICAL PROPERTIES (2007)

Paulraj, M., Ravi, J., Lee, S. Thomas, Pattanayak, Pulok, Asokan, S.

Author Institution: Department of Physics, Faculty of Science in Physics and; Mathematics, University of Concepcion, Casilla160-C, Concepcion - Chile; Department of Instrumentation, Indian Institute...

The influence of network rigidity on the electrical switching behaviour of Ge–Te–Si glasses suitable for phase change memory applications (2007)

Glass transformation studies in Ge-Se-Bi system (2007)

$Ge_{15}Te_{85-x}Si_x (2 \leq x \leq 12)$ glasses of a wide range of compositions have been found to exhibit electrical switching at threshold voltages in the range 100–600V, for a sample thickness...

Achamma, G, Sushama, D, Asokan, S, Awasthi, AM, Predeep, P

The thermal behavior of bulk glasses in the $Ge_{20}Se_{80-x} Bi_x$ (x = 2.5, 4.0, 6.0 at %) system is studied using modulated differential scanning calorimetry (MDSC). All samples have the same...

Electrical switching and spectroscopic studies of silver-vanado-phosphate glasses (2007)

Eraiah, B, Anavekar, RV, Asokan, S

High field electrical switching studies on x $Ag_2O$ – (50–x) $P_2O_5$ –50$V_2O_5$ glasses have been carried out as a function of sample thickness, composition and temperature. The I–V...

Electrical switching and thermal studies on $Ge_{22}Te_{78-x}I_x$ chalcohalide glasses: The effect of iodine on network-topology (2007)

A programmable high voltage electrical switching analyzer for I-V characterization of phase change materials (2007)

Investigations on the electrical switching behavior and thermal studies using Alternating Differential Scanning Calorimetry have been undertaken on bulk, melt-quenched $Ge_{22}Te_{78-x}I_x$ (3 \leq x...

Anomalous electrical switching behaviour in phase-separated bulk Ge-Se-Ag chalcogenide glasses (2006)

Ovonic Phase-Change Materials have found a renewed interest in the recent times owing to their applications in Non-Volatile Random Access Memories. In the present work, a cost-effective high voltage...

Nonlinear I–V characteristics of nanocrystalline $SnO_2$ (2006)

Bulk, Se-rich $Ge_{0.15}Se_{0.85-x}Ag_x (0 \le \times\le 0.20)$ glasses show anomalous electrical switching behaviour which is attributed to difference in the thermal conductivities of $Ag_2S_e$...

Bose, Chandra A, Thangadurai, P, Ramasamy, S, Ganesan, Vijaya, Asokan, S

Current versus voltage characteristics (I–V) of nanocrystalline $SnO_2$ materials have been investigated in air at room temperature. The samples were prepared by the inert gas condensation...

Effect of network connectivity on thermal properties of $As_3_0Te_{70-x}Tl_x$ glasses (2006)

Sharmila, BH, Asokan, S

Alternating differential scanning calorimetry (ADSC) studies were undertaken to investigate the effect of Tl addition on the thermal properties of $As_3_0Te_{70-x}Tl_x$ (6?=?x?=?22 at%) glasses....

Nonlinear I–V characteristics of nanocrystalline $SnO_2$ (2006)

Bose, Chandra A, Thangadurai, P, Ramasamy, S, Ganesan, Vijaya, Asokan, S

Current versus voltage characteristics (I–V) of nanocrystalline $SnO_2$ materials have been investigated in air at room temperature. The samples were prepared by the inert gas condensation...

Effect of network connectivity on thermal properties of $As_3_0Te_{70-x}Tl_x$ glasses (2006)

Sharmila, BH, Asokan, S

Alternating differential scanning calorimetry (ADSC) studies were undertaken to investigate the effect of Tl addition on the thermal properties of $As_3_0Te_{70-x}Tl_x$ (6?=?x?=?22 at%) glasses....

Anomalous electrical switching behaviour in phase-separated bulk Ge-Se-Ag chalcogenide glasses (2006)

Signature of a silver phase percolation threshold in microscopically phase separated ternary Ge0.15Se0.85-xAgx (0 (2005)

Bulk, Se-rich $Ge_{0.15}Se_{0.85-x}Ag_x (0 \le \times\le 0.20)$ glasses show anomalous electrical switching behaviour which is attributed to difference in the thermal conductivities of $Ag_2S_e$...

Pattanayak, Pulok, Asokan, S.

Temperature modulated Alternating Differential Scanning Calorimetric (ADSC) studies show that Se rich Ge0.15Se0.85-xAgx (0

Photoconductivity studies on bulk As-Te-In glasses (2005)

Manikandan, N, Sharmila, BH, Asokan, S

Photocurrent measurements have been undertaken on bulk $As_{40}Te_{60-x}In_{x}$ glasses of different compositions. It has been found that the photocurrent increases with illumination, which can...

Electrical switching and topological thresholds in Ge-Te and Si-Te glasses (2005)

Murthy, CN, Ganesan, V, Asokan, S

Melt-quenched $Ge_{x}Te_{100-x}$ glasses and $Si_{x}Te_{100-x}$ glasses (15 \leq x \leq 25) have been found to exhibit memory switching, with threshold fields of the order of 4-11 kV/cm and 6-25...

Thermal diffusivities and molar volumes of ternary $Al_{20}As_{x}Te_{80-x}$ alloy glasses: evidence of self-organization (2005)

Manohar, Srirang, Murugavel, S, Asokan, S

Thermal diffusivities (\alpha) and molar volumes $(V_{m})$ of bulk $Al_{20}As_{x}Te_{80-x}$ alloy glasses in the composition range 0 \leq x \leq 35 are examined. The results reveal a broad maximum in...

Signature of a silver phase percolation threshold in microscopically phase separated ternary $Ge_0_._1_5Se_0_._8_5_-_xAg_x(0\not\leq x\not\leq 0.20)$ glasses (2005)

Signature of a silver phase percolation threshold in microscopically phase separated ternary $Ge_0_._1_5Se_0_._8_5_-_xAg_x(0\not\leq x\not\leq 0.20)$ glasses (2005)

Temperature modulated alternating differential scanning calorimetric studies show that Se rich $Ge_0_._1_5Se_0_._8_5_-_xAg_x(0\not\leq x\not\leq 0.20)$ glasses are microscopically phase separated,...

Electrical switching and topological thresholds in Ge-Te and Si-Te glasses (2005)

Temperature modulated alternating differential scanning calorimetric studies show that Se rich $Ge_0_._1_5Se_0_._8_5_-_xAg_x(0\not\leq x\not\leq 0.20)$ glasses are microscopically phase separated,...

Murthy, CN, Ganesan, V, Asokan, S

Melt-quenched $Ge_{x}Te_{100-x}$ glasses and $Si_{x}Te_{100-x}$ glasses (15 \leq x \leq 25) have been found to exhibit memory switching, with threshold fields of the order of 4-11 kV/cm and 6-25...

Thermal diffusivities and molar volumes of ternary $Al_{20}As_{x}Te_{80-x}$ alloy glasses: evidence of self-organization (2005)

Manohar, Srirang, Murugavel, S, Asokan, S

Thermal diffusivities (\alpha) and molar volumes $(V_{m})$ of bulk $Al_{20}As_{x}Te_{80-x}$ alloy glasses in the composition range 0 \leq x \leq 35 are examined. The results reveal a broad maximum in...

Photoconductivity studies on bulk As-Te-In glasses (2005)

Manikandan, N, Sharmila, BH, Asokan, S

Photocurrent measurements have been undertaken on bulk $As_{40}Te_{60-x}In_{x}$ glasses of different compositions. It has been found that the photocurrent increases with illumination, which can...

Functionally Expanded Phase-Change Memory: Experiments on Light Influence on Threshold Voltage (2005)

Asokan, S, Savransky, SD, Pattanayak, Pulok, Anbarasu, M

We describe the first experimental results of a light influence on the threshold voltage Vt in new ternary lead-free telluride compound (labeled as SA1). Reduction of Vt on about 35% in SA1...

Thermal diffusivities and molar volumes of ternary Al20AsxTe80-x alloy glasses: evidence of self-organization (2005)

Manohar, S., Murugavel, S., Asokan, S.

Functionally Expanded Phase-Change Memory: Experiments on Light Influence on Threshold Voltage (2005)

Asokan, S, Savransky, SD, Pattanayak, Pulok, Anbarasu, M

We describe the first experimental results of a light influence on the threshold voltage Vt in new ternary lead-free telluride compound (labeled as SA1). Reduction of Vt on about 35% in SA1...

Crown dilaceration of maxillary right permanent central Incisor - A case report (2004)

Asokan, S, Rayen, R, Muthu, M, Sivakumar, N

Spectrum Estimation by Wavelength Shift Time-Stamping in a Fiber Bragg Grating Sensor (2004)

Madhav, Kalaga Venu, Asokan, S

We propose and numerically demonstrate a novel technique for estimating the spectral content of the perturbation on a Fiber Bragg grating (FBG) sensor. The system utilizes an FBG array as a...

Extended rigidity percolation and chemical thresholds in Ge–Te–Pb glasses as revealed by MDSC (2004)

Saheb, Zaheerudeen P, Sharmila, BH, Asokan, S, Gowda, Appaji K

Thermal analysis of $Ge_{20}Te_{80-x}Pb_x$ $(2 \leq x \leq 8)$ glasses has been undertaken using modulated differential scanning calorimetry (MDSC). The compositional dependence of thermal parameters...

Electrical switching studies of lead-doped germanium telluride glasses (2004)

Saheb, PZ, Asokan, S, Gowda, KA

Samples of bulk $Ge_2_0Te_8_0-_xPb_x(2\leq x \leq 8)$ glasses have been prepared by melt quenching and their electrical switching behavior has been investigated as a function of lead content and...

Electrical switching behavior of bulk As-Te-Si glasses: Composition dependence and topological effects (2004)

Electrical switching in As–Te–Ag system–composition and temperature dependence (2004)

The current-voltage characteristics and electrical switching behavior of bulk $As_{30}Te_{70-x}Si_x (2 \leq x \leq 22)$ and $As_{40}Te_{60-x}Si_x (2 \leq x \leq 22)$ glasses were investigated over a...

Selvaraju, VC, Asokan, S, Srinivasan, V

The current–voltage characteristics related to switching phenomena in silver doped arsenic telluride glasses, $As_{20}Te_{80-x}Ag_x$ and $As_{40}Te_{60-x}Ag_x$, have been investigated over a wide...

Spectrum Estimation by Wavelength Shift Time-Stamping in a Fiber Bragg Grating Sensor (2004)

Madhav, Kalaga Venu, Asokan, S

We propose and numerically demonstrate a novel technique for estimating the spectral content of the perturbation on a Fiber Bragg grating (FBG) sensor. The system utilizes an FBG array as a...

Extended rigidity percolation and chemical thresholds in Ge–Te–Pb glasses as revealed by MDSC (2004)

Saheb, Zaheerudeen P, Sharmila, BH, Asokan, S, Gowda, Appaji K

Thermal analysis of $Ge_{20}Te_{80-x}Pb_x$ $(2 \leq x \leq 8)$ glasses has been undertaken using modulated differential scanning calorimetry (MDSC). The compositional dependence of thermal parameters...

Electrical switching in As–Te–Ag system–composition and temperature dependence (2004)

Selvaraju, VC, Asokan, S, Srinivasan, V

The current–voltage characteristics related to switching phenomena in silver doped arsenic telluride glasses, $As_{20}Te_{80-x}Ag_x$ and $As_{40}Te_{60-x}Ag_x$, have been investigated over a wide...

Electrical switching studies of lead-doped germanium telluride glasses (2004)

Saheb, PZ, Asokan, S, Gowda, KA

Samples of bulk $Ge_2_0Te_8_0-_xPb_x(2\leq x \leq 8)$ glasses have been prepared by melt quenching and their electrical switching behavior has been investigated as a function of lead content and...

Electrical switching behavior of bulk As-Te-Si glasses: Composition dependence and topological effects (2004)

A Modulated differential scanning calorimetric study of As–Te–In Glasses (2003)

The current-voltage characteristics and electrical switching behavior of bulk $As_{30}Te_{70-x}Si_x (2 \leq x \leq 22)$ and $As_{40}Te_{60-x}Si_x (2 \leq x \leq 22)$ glasses were investigated over a...

Transient and steady state photoconductivity studies on bulk glasses and amorphous films of Ge-Te-Pb - Composition and spectral dependence (2003)

Bulk As–Te–In glasses have been prepared by conventional melt-quenching technique. Modulated differential scanning calorimetric studies have been undertaken to investigate the glass transition...

Saheb, Zaheerudeen P, Asokan, S, Gowda, Appaji K

Transient photoconductivity studies have been undertaken on bulk Ge20Te80-xPbx glasses with varied lead content (2less than or equal toxless than or equal to8); The composition dependence of...

Threshold electrical switching in $As{_45}Te{_55-x}In{_x}$ and $As{_50}Te{_50-x}In{_x}$ glasses (2002)

Devaraju, JT, Sharmila, BH, Asokan, S, Acharya, KV

The electrical switching behaviour of As45Te55-x In-x (5 less than or equal to x less than or equal to 15) and As50Te50-xInx (2.5 less than or equal to x less than or equal to 11.5) has been studied...

High-pressure resistivity behavior of As–Te–In glasses – the effect of network topological thresholds (2002)

Composition dependence of photoconductivity of $Al_2_0 As_x Te_8_0 - x$ glasses (2002)

Electrical resistivity measurements have been carried out on As–Te–In glasses up to a pressure of 8 GPa using an Opposed Anvil Cell. It is found that the electrical resistivity and conductivity...

Local structure in $Al_20 As_x Te_{80-x}$ glasses revealed by NMR, x-ray and thermal investigations (2002)

The time dependent photocurrent of $Al_2_0 As_x Te_8_0 - x$ glasses has been studied at low temperatures. It is found that the photocurrent of all the $Al_2_0 As_x Te_8_0 - x$ samples studied does...

High-pressure resistivity behavior of As–Te–In glasses – the effect of network topological thresholds (2002)

The coordination environment of aluminium in $Al_20 As_x Te_{80-x}$glasses has been probed by solid state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. Differential...

Composition dependence of photoconductivity of $Al_2_0 As_x Te_8_0 - x$ glasses (2002)

Electrical resistivity measurements have been carried out on As–Te–In glasses up to a pressure of 8 GPa using an Opposed Anvil Cell. It is found that the electrical resistivity and conductivity...

Local structure in $Al_20 As_x Te_{80-x}$ glasses revealed by NMR, x-ray and thermal investigations (2002)

The time dependent photocurrent of $Al_2_0 As_x Te_8_0 - x$ glasses has been studied at low temperatures. It is found that the photocurrent of all the $Al_2_0 As_x Te_8_0 - x$ samples studied does...

Non-Linear I-V Characteristics and Threshold Switching in As-Te-In Glasses (2002)

The coordination environment of aluminium in $Al_20 As_x Te_{80-x}$glasses has been probed by solid state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. Differential...

Devaraju, J. T., Sharmila, B. H., Acharya, K. V., Asokan, S., Gopal, E. S.

Non-linear I-V behaviour and electrical switching exhibited by chalcogenide glassy semiconductors, find applications in variety of areas including information storage and power control. In this work,...

A Modulated differential scanning calorimetric study of As–Te–In Glasses (2002)

Tomographic imaging of phase objects in turbid media through quantitative estimate of phase of ballistic light (2001)

Bulk As–Te–In glasses have been prepared by conventional melt-quenching technique. Modulated differential scanning calorimetric studies have been undertaken to investigate the glass transition...

Chandan, Ganesh G, Vasu, RM, Asokan, S

We demonstrate experimental measurement of phase of the ballistic and near-ballistic component of light transmitted through scattering media. This is done through measurement of transport of...

Influence of chemical disorder on electrical switching in chalcogenide glasses (2001)

Strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples (2001)

We report the results of the electrical switching and thermal studies performed on the bulk $Al_{20}Ge_xTe_{80-x}$ chalcogenide glasses which are a sequel to similar experiments on the...

Manohar, Srirang, Asokan, S

The strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples of metals, semiconductors, and insulators is presented. It utilizes a narrow (500 \mu m...

Strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples (2001)

Manohar, Srirang, Asokan, S

The strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples of metals, semiconductors, and insulators is presented. It utilizes a narrow (500 \mu m...

Influence of chemical disorder on electrical switching in chalcogenide glasses (2001)

Tomographic imaging of phase objects in turbid media through quantitative estimate of phase of ballistic light (2001)

We report the results of the electrical switching and thermal studies performed on the bulk $Al_{20}Ge_xTe_{80-x}$ chalcogenide glasses which are a sequel to similar experiments on the...

Chandan, Ganesh G, Vasu, RM, Asokan, S

We demonstrate experimental measurement of phase of the ballistic and near-ballistic component of light transmitted through scattering media. This is done through measurement of transport of...

Photoacoustic spectroscopy and its application to chalcogenide glassy semiconductors (2000)

Manohar, Srirang, Asokan, S, Gopal, ESR

This article reviews the Photoacoustic technique and its application in spectroscopic and calorimetric studies on chalcogenide semiconducting glasses. A detailed analysis of the Photoacoustic (PA)...

Effect of CuO addition on the high-field and high-pressure behavior of microwave-prepared lead vanadate glasses (2000)

Effect of CuO addition on the high-field and high-pressure behavior of microwave-prepared lead vanadate glasses (2000)

High-field and high-pressure behavior of microwave-prepared xCuO:(45-x) PbO: 55V(2)O(5) (x = 0 to 20) glasses were investigated for the first time. It was found that the addition of CuO significantly...

Photoacoustic spectroscopy and its application to chalcogenide glassy semiconductors (2000)

High-field and high-pressure behavior of microwave-prepared xCuO:(45-x) PbO: 55V(2)O(5) (x = 0 to 20) glasses were investigated for the first time. It was found that the addition of CuO significantly...

Manohar, Srirang, Asokan, S, Gopal, ESR

This article reviews the Photoacoustic technique and its application in spectroscopic and calorimetric studies on chalcogenide semiconducting glasses. A detailed analysis of the Photoacoustic (PA)...

Electrical switching in germanium telluride glasses doped with Cu and Ag (1999)

Composition dependence of electrical properties of Al-Te glasses (1999)

Electrical switching in germanium telluride glasses containing metallic atoms (Cu and Ag) has been investigated. All these glasses are found to exhibit memory switching. The switching fields of these...

Evidence of clustering in an aqueous electrolyte solution: a small-angle X-ray scattering study (1999)

The electrical resistivity of binary AlxTe100-x glasses of different compositions (17 less than or equal to x less than or equal to 30), is measured as a function of temperature in the range 300-180...

Jacob, J, Kumar, A, Asokan, S, Sen, D, Chitra, R, Mazumder, S

The work reported hen was motivated by a desire to verify the existence of structure - specifically MP-rich clusters induced by sodium bromide (NaBr) in the ternary liquid mixture 3-methylpyridine...

Electrical resistivity behaviour of Ag-Ge-Te glasses under pressure at different temperatures: the influence of bonding and topological thresholds (1999)

An automated, externally heated opposed anvil high pressure-high temperature system for electrical resistivity studies (1999)

The electrical resistivity of melt quenched Ge-Te glasses containing Ag has been studied as a function of pressure at different temperatures in a Bridgman anvil set-up. The samples are found to...

Mondal, TK, Murugavel, S, Asokan, S

A simple, externally heated opposed (Bridgman) anvil system has been developed for electrical resistivity measurements up to 8 GPa pressure and 400 degrees C. The whole system is automated, in which...

Electrical switching in germanium telluride glasses doped with Cu and Ag (1999)

Effect of topological thresholds on thermal behaviour of germanium telluride glasses containing metallic additive (1998)

Electrical switching in germanium telluride glasses containing metallic atoms (Cu and Ag) has been investigated. All these glasses are found to exhibit memory switching. The switching fields of these...

Composition tunable memory and threshold switching in Al20AsxTe802x semiconducting glasses (1998)

Differential Scanning Calorimetric (DSC) studies on AgxGe15Te85-x glasses have been undertaken over a wide range of compositions, to understand the effect of topological thresholds on thermal...

Carrier-type reversal in Pb-modified chalcogenide glasses (1998)

I-V studies indicate a composition dependent switching behavior (Memory or Threshold) in bulk Al20AsxTe80-x glasses, which is determined by the coordination and composition of aluminum....

Local structure and electrical switching in chalcogenide glasses (1998)

Carrier-type reversal (p to n) has been observed, in $Pb_xGe_{42-x}Se_{48}Te_{10}$ glasses $(0\leq{x}\leq20)$ at 8 at. % of lead. dc electrical resistivity (p) and activation energy for electrical...

Al coordination in bulk $Al_{x}Te_{1-x}$ glasses from solid-state NMR (1998)

Bulk $Al_xAs_{40}Te_{60-x}$ and $A_lxAs_{40-x}Te_{60}$ glasses $(5\leqx\leq20)$ are found to exhibit memory and threshold switching. $^{27}Al$ solid-state NMR measurements reveal that in both series...

Composition tunable memory and threshold switching in Al20AsxTe802x semiconducting glasses (1998)

Magic-angle-spinning NMR spectroscopic studies (Al-27) have been undertaken to probe the local structure of Al in Al-Te glasses and stoichiometric and nonstoichiometric crystalline Al-Te samples. The...

Effect of topological thresholds on thermal behaviour of germanium telluride glasses containing metallic additive (1998)

I-V studies indicate a composition dependent switching behavior (Memory or Threshold) in bulk Al20AsxTe80-x glasses, which is determined by the coordination and composition of aluminum....

Carrier-type reversal in Pb-modified chalcogenide glasses (1998)

Differential Scanning Calorimetric (DSC) studies on AgxGe15Te85-x glasses have been undertaken over a wide range of compositions, to understand the effect of topological thresholds on thermal...

Local structure and electrical switching in chalcogenide glasses (1998)

Carrier-type reversal (p to n) has been observed, in $Pb_xGe_{42-x}Se_{48}Te_{10}$ glasses $(0\leq{x}\leq20)$ at 8 at. % of lead. dc electrical resistivity (p) and activation energy for electrical...

A Guideline for Designing Chalcogenide-Based Glasses for Threshold Switching Characteristics (1997)

Bulk $Al_xAs_{40}Te_{60-x}$ and $A_lxAs_{40-x}Te_{60}$ glasses $(5\leqx\leq20)$ are found to exhibit memory and threshold switching. $^{27}Al$ solid-state NMR measurements reveal that in both series...

A Guideline for Designing Chalcogenide-Based Glasses for Threshold Switching Characteristics (1997)

Chalcogenide-based switching materials have potential applications in power control and information storage. In this work, an approach has been suggested to design chalcogenide-based amorphous...

Compositional dependence of high pressure resistivity behaviour of Cu-Ge-Te glasses (1996)

Chalcogenide-based switching materials have potential applications in power control and information storage. In this work, an approach has been suggested to design chalcogenide-based amorphous...

Evidence concerning the effect of topology on electrical switching in chalcogenide network glasses (1996)

Electrical resistivity measurements under pressures at ambient and low temperatures have been carried out on bulk, melt quenched $Cu_xGe_{15}Te_{85-x}$ glasses (2

Easily reversible memory switching in Ge–As–Te glasses (1996)

Electrical switching properties of Ge-As-Te glasses have been investigated over a wide range of mean coordination numbers $(\langle r \rangle)$ in a single composition tie line. The results obtained...

Crystallization studies on $Cu_xGe_{15}Te_{85-x}$ glasses (1996)

Electrical switching behaviour of melt-quenched $Ge_{10}As_{45}Te_{45}$ and $Ge_{10}As_{40}Te_{50}$ glasses have been studied in the I– V mode, using a constant current source with incremental...

Easily reversible memory switching in Ge–As–Te glasses (1996)

Differential scanning calorimetric (DSC) studies have been carried out in an attempt to explain the composition dependence of the thermal crystallization behaviour of $Cu_xGe_{15}Te_{85-x}$ glasses....

Evidence concerning the effect of topology on electrical switching in chalcogenide network glasses (1996)

Electrical switching behaviour of melt-quenched $Ge_{10}As_{45}Te_{45}$ and $Ge_{10}As_{40}Te_{50}$ glasses have been studied in the I– V mode, using a constant current source with incremental...

Crystallization studies on $Cu_xGe_{15}Te_{85-x}$ glasses (1996)

Electrical switching properties of Ge-As-Te glasses have been investigated over a wide range of mean coordination numbers $(\langle r \rangle)$ in a single composition tie line. The results obtained...

Compositional dependence of high pressure resistivity behaviour of Cu-Ge-Te glasses (1996)

Differential scanning calorimetric (DSC) studies have been carried out in an attempt to explain the composition dependence of the thermal crystallization behaviour of $Cu_xGe_{15}Te_{85-x}$ glasses....

Pressure-induced metallization in Al-As-Te glasses (1995)

Electrical resistivity measurements under pressures at ambient and low temperatures have been carried out on bulk, melt quenched $Cu_xGe_{15}Te_{85-x}$ glasses (2

Pressure-induced metallization in Al-As-Te glasses (1995)

Electrical resistivity measurements have been undertaken on bulk Al-As-Te glasses at pressures up to 8 GPa and to 80K in a Bridgman anvil setup. The samples have been found to show a continuous...

Electrical switching in AgI based fast ion conducting glasses: Possibility for newer applications (1995)

Electrical resistivity measurements have been undertaken on bulk Al-As-Te glasses at pressures up to 8 GPa and to 80 K in a Bridgman anvil setup. The samples have been found to show a continuous...

Vaidhyanathan, B, Rao, KJ, Prakash, S, Murugavel, S, Asokan, S

A current controlled, high speed, near ideal electrical switching has been observed for the first time in microwave prepared AgI based fast ion conducting glasses. The switching is found to be memory...

Near ideal electrical switching in fast ion conducting glasses: Evidence for an electronic process with chemical origin (1995)

Pressure-induced metallization in Al-As-Te glasses (1995)

Bulk Agl based fast ion conducting (FIC) glasses have been prepared by a novel microwave technique. Electrical switching characteristics of these glasses have been investigated for the first time. It...

Near ideal electrical switching in fast ion conducting glasses: Evidence for an electronic process with chemical origin (1995)

Electrical resistivity measurements have been undertaken on bulk Al-As-Te glasses at pressures up to 8 GPa and to 80K in a Bridgman anvil setup. The samples have been found to show a continuous...

Pressure-induced metallization in Al-As-Te glasses (1995)

Bulk Agl based fast ion conducting (FIC) glasses have been prepared by a novel microwave technique. Electrical switching characteristics of these glasses have been investigated for the first time. It...

Electrical switching in AgI based fast ion conducting glasses: Possibility for newer applications (1995)

Electrical resistivity measurements have been undertaken on bulk Al-As-Te glasses at pressures up to 8 GPa and to 80 K in a Bridgman anvil setup. The samples have been found to show a continuous...

Vaidhyanathan, B, Rao, KJ, Prakash, S, Murugavel, S, Asokan, S

A current controlled, high speed, near ideal electrical switching has been observed for the first time in microwave prepared AgI based fast ion conducting glasses. The switching is found to be memory...

Thermal Crystallization Studies On Ga-Te Glasses (1995)

Prasad, MVN, Asokan, S, Parthasarathy, G, Titus, SSK, Gopal, ESR

Semieonducting GaxTe~oo-x (17 -< x _< 25) glasses have been prepared by melt quenching method and thermal crystallization studies carried out using differential scanning calorimetry. On heating,...

Current-controlled negative-resistance behaviour and memory switching in bulk As-Te-Se glasses (1994)

Chatterjee, R, Asokan, S, Titus, SSK

Tne current-voltage characteristics and electrical switching behaviour of bulk $As_xTe_{100-x-y}Se_y$ glasses have been investigated over a wide composition range $(25\leq x \leq 60; 10 \leq y \leq...

Electrical switching behaviour of semiconducting aluminium telluride glasses (1994)

A PC-based system for studying current-controlled electrical switching in solids (1994)

Semiconducting chalcogenide glasses, $AI_xTe_{100-x}$ with the atomic percentage of ahminim (x) varying between 15 and 25, have been prepared by the vacuum sealed-melt quenching technique. The I-V...

Chatterjee, R, Acharya, KV, Asokan, S, Titus, SSK

A simple PC-based system has been developed for studying the current-controlled electrical switching in solids, in particular amorphous semiconductors. The system has provisions for investigating the...

Effect of Selenium on the Crystallization Behaviour of As-Te Glasses (1994)

Titus, SSK, Asokan, S, Mondal, TK, GopaI, ESR

$As_xTe_{l00-x}$ glasses have been found to exhibit interesting thermal crystallization behaviour. Glasses with x < 40 show a single stage crystallization and those with $x \geq 40$ exhibit a double...

Effect of Selenium on the Crystallization Behaviour of As-Te Glasses (1994)

Titus, SSK, Asokan, S, Mondal, TK, GopaI, ESR

$As_xTe_{l00-x}$ glasses have been found to exhibit interesting thermal crystallization behaviour. Glasses with x < 40 show a single stage crystallization and those with $x \geq 40$ exhibit a double...

A PC-based system for studying current-controlled electrical switching in solids (1994)

Chatterjee, R, Acharya, KV, Asokan, S, Titus, SSK

A simple PC-based system has been developed for studying the current-controlled electrical switching in solids, in particular amorphous semiconductors. The system has provisions for investigating the...

Electrical switching behaviour of semiconducting aluminium telluride glasses (1994)

Current-controlled negative-resistance behaviour and memory switching in bulk As-Te-Se glasses (1994)

Semiconducting chalcogenide glasses, $AI_xTe_{100-x}$ with the atomic percentage of ahminim (x) varying between 15 and 25, have been prepared by the vacuum sealed-melt quenching technique. The I-V...

Chatterjee, R, Asokan, S, Titus, SSK

Tne current-voltage characteristics and electrical switching behaviour of bulk $As_xTe_{100-x-y}Se_y$ glasses have been investigated over a wide composition range $(25\leq x \leq 60; 10 \leq y \leq...

Percolation phenomenon in glasses-the current status (1993)

Gopal, ESR, Srinivasan, A, Asokan, S

The current status of the rigidity percolation threshold in chalcogenide glasses has been discussed. The applicability and shortcomings of Phillips' atomic network model have been discussed and...

Percolation phenomenon in glasses-the current status (1993)

Gopal, ESR, Srinivasan, A, Asokan, S

The current status of the rigidity percolation threshold in chalcogenide glasses has been discussed. The applicability and shortcomings of Phillips' atomic network model have been discussed and...

Thermal crystallization behavior of As-Te glasses (1992)

Titus, SSK, Asokan, S, Panchapagesan, TS, Gopal, ESR

Thermal crystallization behavior of $As_xTe_{100-x}$ $(25\leq_x\leq60)$ glasses is studied by differential scanning calorimetry. $As_xTe_{100-x}$ glasses with x

Thermal crystallization behavior of As-Te glasses (1992)

Titus, SSK, Asokan, S, Panchapagesan, TS, Gopal, ESR

Thermal crystallization behavior of $As_xTe_{100-x}$ $(25\leq_x\leq60)$ glasses is studied by differential scanning calorimetry. $As_xTe_{100-x}$ glasses with x

Calorimetric studies of $Al_xTe_{l00-x}$ glasses: composition dependence of crystallization and a new compound in the A1-Te system (1992)

Ramakrishna, R, Asokan, S, Parthasarathy, G, Titus, SSK, Gopal, ESR

Bulk, semiconducting $Al_xTe_{l00-x}$ glasses have been prepared by quenching from the melt. The thermal crystallization behaviour of these materials has been studied by differential scanning...

Calorimetric studies of $Al_xTe_{l00-x}$ glasses: composition dependence of crystallization and a new compound in the A1-Te system (1992)

Ramakrishna, R, Asokan, S, Parthasarathy, G, Titus, SSK, Gopal, ESR

Bulk, semiconducting $Al_xTe_{l00-x}$ glasses have been prepared by quenching from the melt. The thermal crystallization behaviour of these materials has been studied by differential scanning...

High-pressure studies on the electrical resistivity of arsenic-tellurium glasses (1990)

Titus, SSK, Asokan, S, Ramakrishna, R, Gopal, ESR

Elec. resistivity measurements have been performed on bulk semiconducting AsxTe100-x glasses$ (25 \leq x\leq 60)$ in a Bridgman anvil system. The resistivity of all the AsxTe100-x glassy samples...

High-pressure studies on the electrical resistivity of arsenic-tellurium glasses (1990)

Titus, SSK, Asokan, S, Ramakrishna, R, Gopal, ESR

Elec. resistivity measurements have been performed on bulk semiconducting AsxTe100-x glasses$ (25 \leq x\leq 60)$ in a Bridgman anvil system. The resistivity of all the AsxTe100-x glassy samples...

Metallization and Crystallization of Semiconducting Amorphous $Ga_{20}Te_{80}$ alloy under High Pressure (1988)

Parthasarathy, G, Asokan, S, Titus, SSK, Krishna, RR

Pressure and temperature dependence of the electrical resistivity of amorphous $Ga_{20}Te_{80}$ alloy is reported for the first time. The alloy undergoes a pressure induced amorphous...

Metallization and Crystallization of Semiconducting Amorphous $Ga_{20}Te_{80}$ alloy under High Pressure (1988)

Parthasarathy, G, Asokan, S, Titus, SSK, Krishna, RR

Pressure and temperature dependence of the electrical resistivity of amorphous $Ga_{20}Te_{80}$ alloy is reported for the first time. The alloy undergoes a pressure induced amorphous...

Evidence for a critical composition in Group IV-VI chalcogenide glasses (1987)

Effect of high pressure on the electrical resistivity of glassy oxygenated selenium (1987)

Experimental evidence for an ideal-glass composition in IV-VI chacogenide systems is obtained from high-pressure–low-temperature studies of Si-Te glasses. The electrical resistivity of bulk,...

Parthasarathy, G, Asokan, S

The application of pressure is one of the well-known methods for investigating the properties of glassy semiconductors ([1] and references cited therein). It is well established that small quantities...

Electrical transport and thermal studies on bulk $TI_x$,$Se_{100-x}$. glasses (1987)

Parthasarathy, G, Naik, GM, Asokan, S

Electrical transport and thermal studies on bulk TIx,Se100-x glasses (1987)

Parthasarathy, G, Naik, GM, Asokan, S

Crystallization studies on bulk Ga20Te80 glass (1987)

Parthasarathy, G, Asokan, S, Prasad, MVN, Gopal, ESR

Effect of high pressure on the electrical resistivity of glassy oxygenated selenium (1987)

Parthasarathy, G, Asokan, S

The application of pressure is one of the well-known methods for investigating the properties of glassy semiconductors ([1] and references cited therein). It is well established that small quantities...

Evidence for a critical composition in Group IV-VI chalcogenide glasses (1987)

Crystallization Studies on bulk $Si_xTe_{100-x}$ Glasses (1986)

Experimental evidence for an ideal-glass composition in IV-VI chacogenide systems is obtained from high-pressure–low-temperature studies of Si-Te glasses. The electrical resistivity of bulk,...

Crystallization studies on bulk SixTe100-x glasses (1986)

Bulk $Si_xTe_{l00-x}$ $(10 \leq x \leq 28)$ glasses have been prepared by the melt quenching technique. The crystallization of these glasses has been studied by using differential scanning...

Effect of pressure on the electrical resistivity of bulk amorphous Al23Te77 alloy under various stages of crystallization (1986)

Bulk SixTe100-x (10 less-than-or-equals, slant x less-than-or-equals, slant 28) glasses have been prepared by the melt quenching technique. The crystallization of these glasses has been studied by...

Parthasarathy, G, Ramakrishna, R, Asokan, S, Gopal, ESR

Evidence for a new metastable crystalline compound in Ge---Te system (1986)

Crystallization Studies on bulk $Si_xTe_{100-x}$ Glasses (1986)

Pressure dependence of the electrical resistivity of bulk, melt quenched GexTe100−x glasses (15 less-than-or-equals, slant x less-than-or-equals, slant 28) has been studied up to 8GPa pressure. All...

Electrical transport and crystallization studies of glassy semiconducting Si20Te80 alloy at high pressure (1986)

Bulk $Si_xTe_{l00-x}$ $(10 \leq x \leq 28)$ glasses have been prepared by the melt quenching technique. The crystallization of these glasses has been studied by using differential scanning...

Asokan, S, Parthasarathy, G, Subbanna, G N, Gopal, E S R

The effect of pressure on the electrical resistivity of bulk Si20Te80 glass is reported. Results of calorimetric, X-ray and transmission electron microscopy investigations at different stages of...

Double glass transition and double stage crystallization of bulk $Si_{20}Te_{80}$ glass (1985)

Double glass transition and double stage crystallization of bulk $Si_{20}Te_{80}$ glass (1985)

The phenomenon of phase separation and double stage crystallization in chalcogenide glasses is an unusual property of considerable interest. In continuation of the work of $Ge_{20}Te_{80}$ and...